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The Effect of pH on Catalase Activity

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Jes Stj

on 25 March 2013

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Transcript of The Effect of pH on Catalase Activity

Purpose The purpose of this lab was to determine whether pH affects the rate of enzyme activity. Hypothesis It was predicted that the reaction rate would be greater at a lower pH. Procedure 1. Safety precautions were taken and materials gathered. 2. The enzyme and substrate were measured. 3. A pH agent was added to the enzyme, and the resulting mixture was added to the substrate. 4. The height of the foam produced was measured every two seconds. 5. Observations were recorded. Observations Conclusion It was concluded that the activity of enzyme is greatest at a pH of between 7 and 11.5. Our prediction was proven to be wrong. Sources of Error Sources of error during the lab were...
inaccurate measurements
loss of enzyme
test tubes were too small
marking foam height As shown in the above table, when water was added to the beef liver, it created more foam height when poured with hydrogen peroxide then when the vinegar and ammonia were used. the pH level that the enzyme works faster with is roughly around 7-11.5. when the acid was added to the hydrogen peroxide, there weren't many bubbles whereas when the water and ammonia were added, there was a lot which indicated that our hypothesis was wrong.
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